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Audio Tempo Change

Change audio tempo without changing pitch

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: audio/*

Key Facts

Category
Media
Input Types
file, number, select
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Audio Tempo Change tool allows you to adjust the playback speed of audio files—speeding them up or slowing them down—without altering the pitch. It's designed for musicians, podcasters, and anyone needing precise tempo modifications for practice, listening, or editing.

When to Use

  • •When practicing musical instruments at a slower tempo to master difficult sections without changing the key.
  • •To accelerate audio content like podcasts or lectures for more efficient listening.
  • •When synchronizing audio with video projects that require timing adjustments for better alignment.

How It Works

  • •Upload your audio file in a supported format, such as MP3, WAV, or AAC.
  • •Specify the tempo change percentage, ranging from -75% (slower) to +300% (faster).
  • •Select an output format from options like MP3, FLAC, or WAV to suit your needs.
  • •Process the file and download the audio with the adjusted tempo.

Use Cases

Musicians slowing down complex solos or passages for detailed practice sessions.
Podcast listeners speeding up episodes to consume content more quickly while retaining clarity.
Audio editors adjusting tempo to match video timelines or project requirements.

Examples

1. Slow Down a Guitar Solo for Practice

Guitar student
Background
A student is learning a fast guitar solo from a recording but finds it challenging to follow at normal speed.
Problem
The solo's tempo is too quick to play along with during practice.
How to Use
Upload the audio file, set tempoPercent to -30 to reduce speed by 30%, and choose WAV output for high-quality playback.
Example Config
tempoPercent: -30, outputFormat: wav
Outcome
The slowed-down audio enables the student to practice the solo at a manageable pace without pitch distortion.

2. Accelerate a Lecture for Efficient Review

Student
Background
A student has recorded lectures that are lengthy and time-consuming to review.
Problem
Listening to lectures at normal speed takes too long, reducing study efficiency.
How to Use
Upload the lecture audio, set tempoPercent to 50 to increase speed by 50%, and output as MP3 for easy playback on devices.
Example Config
tempoPercent: 50, outputFormat: mp3
Outcome
The sped-up audio saves time while maintaining intelligibility for quick revision.

Try with Samples

audio, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What audio formats can I upload?

You can upload any audio file format, including MP3, WAV, AAC, OGG, and more.

How much can I change the tempo?

Tempo can be adjusted from -75% to +300% of the original speed.

Does changing tempo affect the pitch?

No, this tool modifies only the tempo, keeping the pitch unchanged.

What output formats are available?

Supported output formats include MP3, AAC, M4A, OGG, Opus, FLAC, and WAV.

Is there a file size limit?

Yes, the audio file must be under 200 MB in size.

API Documentation

Request Endpoint

POST /en/api/tools/audio-tempo-change

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
tempoPercent number No -
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-tempo-change to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-tempo-change": {
      "name": "audio-tempo-change",
      "description": "Change audio tempo without changing pitch",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-tempo-change",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]